Javascript同时执行If和Else条件(PHP）

我有一个关于Javascript和PHP的奇怪问题。

这些是我的代码

<script>
<?php
        $servername = "localhost";
        $username = "root";
        $password = "rootroot";
        $dbname = "onlinerecruitment";
        // Create connection
        $conn = new mysqli($servername, $username, $password, $dbname);
        // Check connection
        if ($conn->connect_error) {
            die("Connection failed: " . $conn->connect_error);
        }
        $s_id = NULL;
        $pos_id = $_POST['position'];
        $s_name = $_POST['skill_name'];
        $s_wg = $_POST['skill_weight'];
        $click = $_POST['clicks'];
        $sum = array_sum($s_wg);
?>
var sum = '<?php array_sum($s_wg); ?>';
        if( sum != 10){
                    alert("Weight-score is over or lower than 10.");
        }else{
<?php
        for($i=0; $i <= $click; $i++){
                $sql = ("INSERT INTO required_skills VALUES ('".$s_id."' , '".$pos_id."' , '".$s_name[$i]."' ,'".$s_wg[$i]."')");
                $resultt = "";
                if ($conn->query($sql) == TRUE) {
                   $resultt = "FINISH";
                } else {
                   $resultt = "ERROR";
                }
        }
        $conn->close();
?>

        var Message = ' <?php  echo $resultt; ?>';
        if((Message + "") == "ERROR"){
        alert("Something wrong, please contract web admin.");
        }else{
        alert("Weight-score setup successful.");
        location.href = "Weight_Score_Setup.php"
        } 
    }           

正如你所看到的，有If和Else条件，我测试这个页面以获得"If"条件。结果变成了"If"，但INSERT查询也在工作，它不应该这样做，因为它们都处于"Else"条件下。我不知道怎么解决这个问题。请帮忙。